var nbsp = 160;		// non-breaking space char
var node_text = 3;	// DOM text node-type
var emptyString = /^\s*$/ ;
var global_valfield;	// retain valfield for timer thread

// --------------------------------------------
//                  trim
// Trim leading/trailing whitespace off string
// --------------------------------------------

function trim(str)
{
  return str.replace(/^\s+|\s+$/g, '');
}


// --------------------------------------------
//                  setfocus
// Delayed focus setting to get around IE bug
// --------------------------------------------

function setFocusDelayed()
{
  global_valfield.focus();
}

function setfocus(valfield)
{
  // save valfield in global variable so value retained when routine exits
  global_valfield = valfield;
  setTimeout( 'setFocusDelayed()', 100 );
}


// --------------------------------------------
//                  msg
// Display warn/error message in HTML element.
// commonCheck routine must have previously been called
// --------------------------------------------

function msg(fld,     // id of element to display message in
             msgtype, // class to give element ("warn" or "error")
             message) // string to display
{
  // setting an empty string can give problems if later set to a 
  // non-empty string, so ensure a space present. (For Mozilla and Opera one could 
  // simply use a space, but IE demands something more, like a non-breaking space.)
  var dispmessage;
  if (emptyString.test(message)) 
    dispmessage = String.fromCharCode(nbsp);    
  else  
    dispmessage = message;

  var elem = document.getElementById(fld);
  elem.firstChild.nodeValue = dispmessage;  
  
  elem.className = msgtype;   // set the CSS class to adjust appearance of message
}

// --------------------------------------------
//            commonCheck
// Common code for all validation routines to:
// (a) check for older / less-equipped browsers
// (b) check if empty fields are required
// Returns true (validation passed), 
//         false (validation failed) or 
//         proceed (don't know yet)
// --------------------------------------------

var proceed = 2;  

function commonCheck    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(infofield);
  if (!elem.firstChild) return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text) return true;  // infofield is wrong type of node  
  
 /* if (emptyString.test(valfield.value)) {   
  		
        msg(infofield, "error", "ERROR: required");  
        setfocus(valfield);
        return false;
      }        
     else {     	
        msg (infofield, "warn", "");   // OK
        return true;  
      }  */
  return proceed;
}

// --------------------------------------------
//            validateuserName
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------

function validateuserName(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  var stat = commonCheck (valfield, infofield, true);   
  var usrname = trim(valfield.value);	
  var usernamestarts=/^[a-zA-Z0-9]$/ ;  
    
   retrieveURL('checkavailActions.do?userName='+valfield.value); 	
 	
 
  if(valfield.value.length==0)
  	{
  		msg (infofield, "error", "User Name is required"); 
 		//setfocus(valfield);
    	return false;
    }
  else if(!usernamestarts.test(usrname.charAt(0)))
  	{
  		msg (infofield, "error", "User Name must start with a letter (a-z) or a digit (0-9)."); 
 		//setfocus(valfield);
    	return false;
  	}
  else if(valfield.value.length <3 || valfield.value.length > 20)
  	  {
 		msg (infofield, "error", "User Name should be in 3 to 20 chars. of length."); 
 		//setfocus(valfield);
    	return false;
  	  }   
   for (var j=33;j<127; j++)
 	 {
 	 	for(var i=0;i<valfield.value.length;i++)
 	 	{
 	 		
 	 		if(!valfield.value.charCodeAt(i).test(j))
 	 		{
 	 			
 	 			msg (infofield, "error", "Enter only the valid char."); 
 				//setfocus(valfield);
    			return false;
 	 		} 	 		
  	 	}
  	 } 
   
  if (stat != proceed) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
  

  
}

// --------------------------------------------
//            validateuserPassword
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------
var password;
function validateuserPassword(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  password=valfield.value;
  var stat = commonCheck (valfield, infofield, true);  
  if(valfield.value.length==0)
  	{
  		msg (infofield, "error", "Password is required"); 
 		//setfocus(valfield);
    	return false;
    }
  else if(valfield.value.length <4 || valfield.value.length > 20)
  	  {
 		msg (infofield, "error", "Password should be in 4 to 20 chars. of length."); 
 		//setfocus(valfield);
    	return false;
  	  }   	
  if (stat != proceed) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
}

// --------------------------------------------
//            validateuserRePassword
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------

function validateuserRePassword(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  
  var stat = commonCheck (valfield, infofield, true);  
  if(valfield.value.length==0)
  	{
  		msg (infofield, "error", "Retype Password is required"); 
 		//setfocus(valfield);
    	return false;
    }
  else if(password!=valfield.value)
  	  {
 		msg (infofield, "error", "Password doesn't match."); 
 		//setfocus(valfield);
    	return false;
  	  }   	
  if (stat != proceed) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
}


// --------------------------------------------
//            validateAboutuser
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------

function validateAboutuser(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  
  var stat = commonCheck (valfield, infofield, true); 
    
  if(valfield.value.length>180)
  	{
  		msg (infofield, "error", "Max. 180 chars. only allowed."); 
 		//setfocus(valfield);
    	return false;
    }  
  if (stat != proceed && valfield.value.length==0) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
}

// --------------------------------------------
//               validateEmail
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateEmail  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
   
  var stat = commonCheck (valfield, infofield, required);
  
  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/  ;
  if (!email.test(tfld)) {
    msg (infofield, "error", "Enter a valid e-mail address");
    //setfocus(valfield);
    return false;
  }

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/  ;
  if (!email2.test(tfld)) 
    msg (infofield, "warn", "Unusual e-mail address - check if correct");
  else
    msg (infofield, "warn", "");
  return true;
   
  if (stat != proceed)
  	 return stat;
}


function validateupdatepassword(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  password=valfield.value;
  var stat = commonCheck (valfield, infofield, true);  
  if(password!=valfield.value)
  	  {
 		msg (infofield, "error", "Password doesn't match."); 
 		//setfocus(valfield);
    	return false;
  	  }   	
  if (stat != proceed) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
}

function validateupdaterepassword(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  password=valfield.value;
  var stat = commonCheck (valfield, infofield, true);  
  if(valfield.value.length <4 || valfield.value.length > 20)
  	  {
 		msg (infofield, "error", "Password should be in 4 to 20 chars. of length."); 
 		//setfocus(valfield);
    	return false;
  	  }   	
  if (stat != proceed) 
  	return stat; 
  msg (infofield, "warn", "");   
  return true;
}

// --------------------------------------------
//            validateTelnr
// Validate telephone number
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateTelnr  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!telnr.test(tfld)) {
    msg (infofield, "error", "ERROR: not a valid telephone number. Characters permitted are digits, space ()- and leading +");
   // setfocus(valfield);
    return false;
  }

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<6) {
    msg (infofield, "error", "ERROR: " + numdigits + " digits - too short");
    //setfocus(valfield);
    return false;
  }

  if (numdigits>14)
    msg (infofield, "warn", numdigits + " digits - check if correct");
  else { 
    if (numdigits<10)
      msg (infofield, "warn", "Only " + numdigits + " digits - check if correct");
    else
      msg (infofield, "warn", "");
  }
  return true;
}

// --------------------------------------------
//             validateAge
// Validate person's age
// Returns true if OK 
// --------------------------------------------

function validateAge    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed && valfield.value.length==0) return stat;

  var tfld = trim(valfield.value);
  var ageRE = /^[0-9]{1,3}$/
  if (!ageRE.test(tfld)) {
    msg (infofield, "error", "ERROR: not a valid age");
    //setfocus(valfield);
    return false;
  }

  if (tfld>=200) {
    msg (infofield, "error", "ERROR: not a valid age");
    //setfocus(valfield);
    return false;
  }

  if (tfld>110) msg (infofield, "warn", "Older than 110: check correct");
  else {
    if (tfld<7) msg (infofield, "warn", "Bit young for this, aren't you?");
    else        msg (infofield, "warn", "");
  }
  return true;
}